fix: chat identifier position

ui/app/AppLayouts/Chat/ChatColumn/ChatMessages.qml

@@ -20,7 +20,7 @@ ScrollView {
     Layout.fillWidth: true
     Layout.fillHeight: true
 
-    ScrollBar.vertical.policy: ScrollBar.AlwaysOn
+    ScrollBar.vertical.policy: chatLogView.contentHeight > chatLogView.height ? ScrollBar.AlwaysOn : ScrollBar.AlwaysOff
     ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
 
     ListView {

ui/app/AppLayouts/Chat/ChatColumn/Message.qml

@@ -24,7 +24,7 @@ Item {
     height: {
         switch(contentType){
             case Constants.chatIdentifier:
-                return 196;
+                return parent.parent.height
             case Constants.stickerType:
                 return stickerId.height + 50
             default:
@@ -40,8 +40,7 @@ Item {
         id: channelIdentifier
         visible: authorCurrentMsg == ""
         anchors.horizontalCenter: parent.horizontalCenter
-        anchors.topMargin: 20
-        anchors.top: parent.top
+        anchors.verticalCenter: parent.verticalCenter
         
         Rectangle {
             id: circleId